- Oct 4, 2003
- Reaction score
- Phoenix, AZ
A word of caution. NEVER go from full cock directly to half cock if the lock has a fly in it.Don’t really see how a hammer being too close to the nipple at half cock to put a cap on the nipple is a problem. If one is not capable or unsure of lowering a hammer from full to half cock, not sure I would want them to go from half to full cock.....
The fly's job is to keep the sear from entering the half cock notch while the hammer is falling from the full cock position.
When the nose of the sear comes to the fly, the fly which sticks out above the outside of the tumbler causes the sear to jump over the half cock notch. The problem with this is, if the hammer or cock is lowered slowly, rather than jumping over the fly, the nose of the sear can hang up on it. This will cause the hammer/cock to stop, making it appear that the lock is in the half-cock position while, it is not.
If the sear has hung up on the fly, any sharp rap or impact to the gun can cause the sear nose to lose it's grip on the fly and the hammer/cock will fall to the fired condition, often firing the percussion cap or causing a shower of sparks in a flintlock.
The only safe way to put a gun into the half cock position is to first, lower the hammer/cock nearly to the fired position and then raise the hammer/cock directly to half cock.
Almost all of the newly made guns with double set triggers have a fly in the lock. It is needed to make the double set triggers fire the gun so be warned.
Never place the hammer of a gun that has double set triggers directly from full cock to half cock.